Having the other heir sign a quit claim so the paper trail is bulletin proof.

As a junior in possession they may work with you.  86k is not enough to do a BK over that would really hurt you going forward. worse that comes out of it is you know their position. its possible though that the property will bid higher than the 600k . if it goes to sale make sure you attend and watch the action very closely make sure bidders that qualify checks are not talking to each other and making side deals so the property only goes for minimum bid and you get nothing.. this is called colluding to stymie open bidding and in some markets it quite common.

R302.3.1 is quite clear on the supporting walls.

Should I send a notice to quit a month before they move out?

So are you quitting Arbitrage or are you hiring someone else to manage your Arbitrage properties?

I don't know where you live, but in California, I would immediately serve them with a 3-day notice to pay or quit. 

Any answers would be greatly appreciated.Hi Srini, I own quite a few rentals in the North Linden area.

Its important to look at your metro area, but also at local neighborhoods, as they can differ quite a bit. 

Hi Dustin, I will say that section 8 and rental assistance programs are quite slow when it comes to getting back - if they do qualify, they should be able to get rental assistance but it likely will take a bit of time before you get paid as a landlord.

Was thinking of moving the Duplex to an LLC through a quit Claim, but  not sure that will enhance my buying ability.